Gateway TLG3901B/BLV2 Series User Manual
V2.0.4
28
December 2020
Table 4-3 txpk JSON Components in ANNWS.01.2.1.W.SYS
Field
Type
Comment
imme
(boolean, not required)
If true, the gateway is commanded to transmit the
frame immediately.
tmst
(unsigned integer, not re-
quired)
If "imme" is not true and "tmst" is present, the gateway
is commanded to transmit the frame when its internal
timestamp counter equals the value of "tmst".
time
(string, required)
UTC time. The precision is one microsecond. The for-
mat is ISO 8601 ‘compact’ format. If "imme" is false or
not present and "tmst" is not present, the gateway is
commanded to transmit the frame at this time.
freq
(unsigned float,
Hz precision,
not required)
The center frequency on when the frame is to be
transmitted in units of MHz.
rfch
(unsigned integer,
required)
The antenna on which the gateway is commanded to
transmit the frame.
powe
(signed integer,
not required)
The output power which what the gateway is com-
manded to transmit the frame.
modu
(string, not required)
The modulation technique used:
"LORA", representing LoRa modulation
"FSK", representing FSK modulation.
datr
(string, not required)
Datarate identifier. When "modu" equals "LORA",
"datr" comprises "SFnBWm", where 'n' is an integer
representing the frame's 'spreading factor' and 'm' is
an integer representing the frame's bandwidth in units
of kHz. When "modu" equals "FSK" "datr" comprises
an integer representing the frame's bit rate in units of
Hz.
codr
(string, required if "modu"
equals "LoRa")
ECC code rate. "codr" comprises the string "k/n",
where 'k' represents the carried bits and 'n' the total
number of bits transmitted, including those added by
the error checking/correction algorithm. Transmitted
only when "modu" equals "LORA".
ipol
(boolean, required)
If true, commands gateway to invert the polarity of the
transmitted bits. LoRa Server sets value to true when
"modu" equals "LORA", otherwise the value is omit-
ted.
size
(unsigned integer, not
The number of octets in the received frame.